Thks again Robbie & it’s nice to see synology supporting the home/office/prosumer market a little more. However let me remember us ; More disks is more power draw, more vibrations more heat production and more physical space used. With the added redundancy comes less capacity as the redundancy means disks are there just to cover the situation where one or potentially more disks fail protecting you from data loss in those cases. This remote accessibility feature of NAS devices trumps traditional storage methods. Rather than carrying around an external hard drive or the best flash drive, you can securely retrieve files from any internet-connected device. Additionally, NAS devices can serve as a centralized storage hub within your network. Whether for work or personal use, every computer on the network can utilize the NAS as if it were an internal drive. This centralized approach ensures that even if one PC fails, the stored data remains intact and secure in the NAS. The benefits of an internal SSD drive are the same as the external: They’re fast, they use less power, have no moving parts, and they’re whisper-quiet. The downsides are the same: For those benefits, you’ll be paying a lot more per TB of storage. That said, prices on internal SSDs seem to be more accessible than the external devices, so adding a terabyte or two is more achievable for a little extra effort. https://www.synology.com/en-us/compatibility?search_by=products&model=DS723%2B&category=hdds_no_ssd_trim

The drives themselves are fantastically dull in appearance of course, as one might expect from the enterprise tier and also feature quite an aggressive spin up noise. However, in much larger scale environments, you will almost certainly not hear the drive media over the ambient system fan noise. Overall still an oldie but a goodie! Platters – These are the disks inside the HDD that store data. Higher capacity drives feature more platters. Although compression techniques can increase space, there’s a limit to their effectiveness. Business-wide you should replace your HD’s every 3 years (5 years, max) but for the average user at home, you replace when really needed. (or after 10 years?)

I assume the home/office/prosumer market is all-but free-riding on their megala-enterprise/corporate market success. The Ultrastar series of hard drives will often be compared against the WD Red Pro range of NAS hard drives when considering populating a server. It is worth remembering that the Ultrastar series is designed for both a higher performance AND a much more enduring performance – i.e it can maintain that level, as well as switch between processes, for much longer. Indeed in testing, the Ultrastar even features a much higher Read and Write performance than pretty much any other drive that peaks as high as 280MB/s in our ATTO DiskBenchmark testing below with just a single HDD. Even the IOs (IOPS_ went as high as 19,000, which although low when compared with modern high-end SSDs, for a single HDD is really impressive). As that way there is often a HD-size (and above) that the price per TB is higher than the smaller/previous-size one. (price per TB)

Cache – This memory area on the NAS hard drive compiles and distributes data being processed by the disk. Larger capacity NAS hard drives typically have a larger cache, as do drives using Shingled Magnetic Recording (SMR), which requires more handling space due to its unique writing style.I hope you will be able and willing to answer my question. I have a DS218+ with 2 8TB seagate iron wolf harddrives. I want to have an upgrade so I’m buying a DS420+ nas and 2 18TB seagate iron wolf harddrives. My plan is to replace my 2bay synology to the new 4bay synology and I want to know if I can just put the 2 8TB drives into the new synology and then also add the 2 new 18TB drive in bay 3 and 4.. In recent years we have seen Seagate reshuffle their range of available capacities to align the capacities from 1-12TB to arrive in the standard Ironwolf range and Capacities of up to 18TB and 22TB to arrive on the PRO series (likely due to those larger capacity options requiring the more enterprise hardware as standard and making a non-PRO version impossible without purposely nerf’ing the lesser drives intentionally. There is crossover in 4-12TB models in between, however, the distinction in RPM, cache, build design and TBW rating is wide enough to justify this. The noise level of the Ironwolf HDD series in PRO is noticeable higher, but given these are designed for larger arrays, this noise increase will be less noticeable over the ambient noise of the whole system generally. Bigger means less power draw, less vibrations and less potential heat, less physical space used and more capacity. When I originally set it up, it had two drives in it. It was kind of noisy but no more than I expected. When I added a third drive, the noise and amount of disc access was much greater than it had been. If you are looking to populate a compact, modestly powered, desktop NAS system (so a 1-Bay or 2-Bay NAS drive), then you have quite a large range of Hard Drives on offer. It is worth highlighting though that larger and more enterprise drives (i.e faster and longer warranty) will be noticeably noisier. Additionally, you will need to factor in that your maximum storage is going to be capped at either a single drive OR (in a 2-Bay NAS with RAID 1) your storage halved to maintain redundancy. Finally, you will need to factor in that most 2-Bay NAS devices will either have a smaller external network connection (1/2.5Gbe) or are not really capable of saturating a full connection externally. So, baring these factors in mind, I would recommend the WD Red series of NAS hard drives for small NAS systems. They do not typically have more aggressive hardware internally, so the ambient noise when these drives are running will be remarkably low.